Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Deferred merchant payables	$ 31,251,000	$ 31,251,000	$ 1,303,000
Operating cash flow generated		15,535,000
Payable balance acquired with business acquisition	$ 14,500,000